Carbureter.



G. G. WELD.

GARBUBBTER.

APPLIOATION Hmm ocr. 14. 1910,

Patentd Jan. 16

e Wto/v cARLEY ern-n.713k WELD, or NoRTHIcHATHAi/r, MASSACHUSETTS.-

GARBURETER.

To all whom t m'ayconcem:

Be itknown that I, CARLEY GoULD WELD, a citizen of the United States, residing in North Chatham, in the county of Barnstable' and Commonwealth of Massachusetts,A have invented certain new and useful Improvements in Carbure'ters, of which the following is a full, clear, and .exactI specifica-tion.k

This invention relates to carbureters and has amongits objects the supplying-of an explosive mixture of constant richness to" v trolled by the strength of the suction from the engine cylinderl the and the effective area of the opening of t e gasolene port is controlled in vunison with the air port but is` adjustable relative to the air port for varying the richness of the mixture supplied.

InA one form. of my invention, which may be regarded at present as the preferred form, and which yis illustrated.. herein, the 'registeringy openings for forming the v air port are Shown rectangular, the area of effective port opening being controlled by the" suction from .the engine cylinder; and a pair of ports, one rectangular and the other triangulanvone adjustable as to its own area, and one adjustable relative to the other, are shown for the ga olene, the effective area of this gasolene port eing shown cont-.rolled in unison with the ailr port, andadjustable relative thereto.` In the drawings acompanying and forming a part of'this specification an illustrative example of-a' practicable embodiment of one form of my invent-ion is shown, in

which, j

Fi re 1 is a central vert-ical section of evice. Fig. 2 is anl elevation-.of-one of the parts detached. Fig. 3 is an eleva-- tion ofthelower portion of the parts shown. in 2 looking at this from the right hand Side. Fig. 4 is a section taken ona I Specification of Letters Patent. Application 1ed'0ctober-14, 1910.' Serial No. 587,028." V y point.

about right angles to the plane of Fig.A 1,

and Fig. 5 is a detail of the valve-formingparts, showing the valve 'in 'its open position.

The following is a detailed description` of vthe illustrated form of my invention:

-' TE s'rArns 12u-i.TENT onrron.

- Patented-Jan. 16,1912.'

' plane'at about the line 3'-3 of .1 yand There is provided a gasolene oatv tank 5,'

which is adapted t-o be secured to somefsuitable part .of the engine or to its support.

It has a gasolene pipe.- A two-diameter cylinder is illustrated; the-portion oflarger diameter 7, is provided at one end witha flange. 8, for securement to the engine. Thisport-ionisalso `provided with a throttlef).

The other end of the. larger portion is provided with a flange 10, which constitutes a closure for the float chamber 5. The portion 11, which is the portion of lesser diam-l eter of the cylinder, vextends through the float chamber and is provided at its lower end with av screw thread,engaging a screwt-hreaded opening in the lower wall of such chamber, and is also provided with a locknut 12, yfor making a tight joint at this This screw-threaded `connection holds the closure flange 1 0y down upon the float chamber. der is provided with an inlet port y13, open to the air.

The portion 7 of the ,cylinf This port' islocated in such posit-ion that it lwill .be closed'by -a piston 1 mounted in the cylinder. and opened byy movement of such piston. lThe piston is a two-diameter 4piston having a two-diameter eter has a working fit with the portion 7 of larger diameter of the cylinder, and is prochamber. The portion ltjof larger' diamcharge these ports will comevinto register' one with the other. -V l v It will vbe noted that the Hoor portion of the port 15 slants inwardly.` This is for the purpose of collecting any ungasifled gasolene and directing it inwardly to su'ch position that the movement'of'th'e air will take it up. The outline of these ports is the-same dimensions and form.' A slot 16 yrectamgzgular and they are of substantially'of'- is made in the sideof the piston portion 14 "for the'engagement of a stop`17 which`will'-' limit `thel inward and the 'outward excursions of the piston in its reciprocations. It is so timed that an amount of space 1 8 is provided for actingas a'cushion or dash pot oni the in ward excursion.' The portion 19 of lesser diameter of the piston isv 1n the .1f-'form of a tube Carried by tliepiston head and is. in the main free from engagement with the interior of the portion 11 of the cylinder. It is,'however, provided -atfit's lower portion ,with an enlargement l20 which will have a guided movement, but sufficiently .free to permit passage of air to and from' the dash pot space 18.

An elbow tube 21 extends fromthe lower portion of the'loat chamber and carries `a stand-'pipe 22-wliich has a'port 23 in con-- .nection withthe elbow tube 21.l The upper end'of thestand-pipe extends into the piston portionv 19 at its lower part. For the purlpose of regulating the amount of opening at the upper end of the standpipe therel is provided a top or closure 24 carried by a .stem 2'5 which extends within Ythe standy ppe and hasat its lower enda screw-.threadl:connection at 26 with what mayl beV termed the basev portion 27 of the standpipe, which portion by lmeans of a set nut 28 andiatlande 29 will be securely clamped Aao l in position.

`he lower 'portion of the stem 25," is provided with a screw driver connectiona-nd a key 30, whereby the stem may be rotated and the screw thread connection rendered effective for raising -and lowering the closure head 24, for making a larger or smallerannular outlet or port for the gaso lene at the ,top of the Istand-pipe. The porf' tion 27 lcarries a stuiing box 270 for the stern of its key 30 for preventing leakage' at this point'. AA. sleeve 31 having a close fit with the stand-pipe and reciprocalle relativeA thereto, is carried'by the piston.4 The sleeve is closed at its upper end which closure in the form oa nuty 32 which has sore hreaded 'connection with a hanger 33y ed by a bracket 34 fast on the head of'j l iston. The lower portion `of the sleel "is provided witha slot 35, which tive to the, piston.

ged by a finger 350 ofan actuator '36, -w ereby the sleevemay be rotated for effecting its longitudinal adjustment rela- The sleeve 31 is provided with atriangular-port 37, the base of which is about 240 degrees of the circumference of the sleeve 31. The. port 3T is placed with itsapex at its upper .portion and islocated in position to register with the annular port 38 between the head 24 and the end of the stand-pipe 22 when-the piston vis drawn up. v v

'By Vadjusting'the headv 24 relative-to the end of the stand ipe`22 the lateral dimension of the ,port etween the annular port- 38 and the port37 .will be adjusted. The amount of movement of the sleeve 3,1 relative to the port 38 will control the effective area of opening at the -port at'each piston movement. After the sleeve 31 and the head y which is dra-wn from the carbureter at any time. 'Phe form of the port in the sleeve 31 will reduce the' leakage of gasolene at this point .particularly'at low speed, which leakage would haven tendencyl to make the gasolene4 too rich at the low speeds.'

. From the foregoing description it will be i seen that the amount of gasolene delivered mav be regulated.v .by regulation of the port 38 and that the timing ofthe opening of this port may be regulated by adjusting the lon.

gitudinal position of the sleeve 31.

As the sides of the port opening are straight it vwill. be seen that the increasein the amount of gasolene admitted is in direct proportion to the lift, and as the air ports are rectangular and thevacuum con-l stant, 1t 11s evident that the a1r and gasolene will always be in the same proportion. The amount ofgasolene admitted for a definite amountv of' lift can be regulated by the height or vertical dimension of the annular port 38.

The initial air port is provided between the` small diameter chamber part 19, and the sleeve 31. .The vertical adjustmeritof the sleeve 31 gives the correct amount of gasolene for the air which comes ythrough the primary air opening, this being made small enough so that even at the lowest speeds the main air ports will come into use.

. The foregoing is a ydetailed description of lone form of embodiment of my invention which has been found efficient ,in practice but it is to be understood that Ido not purpose limiting myself to this' exact construction since changes may be made'within the scope of my invention.

- Having thus described my invention what I cla-im and desire to secure by Letters Pat-- ent is:

1. In a carbureter the combination with a piston open to the suction of the engine cylinder, of a member having an air port located in position to be controlled .by the piston, a member having a gasolene port located in position. to be controlledby the piston, means for regulating the relative timing of these ports, `and means independent thereof for 'adjusting the eliicient area of opening of one of the ports relative to the other. f

' 2. In a carbureter the combination with a 130 piston open to the suction of the engine cylinder, of a cylinder having an air port located in position to be opened and closed by the piston in its reciprocations, a member having a gasolene port located in position to be opened and closed by the piston in its reciprocations, means for regulatingthe tim.

ing of the opening and closing of these ports one relative to the other, and means independent o such regulating means for adjusting the efficient area of opening of the gasolene port relative to the air port.

. 3. In a carbureter the combination with a Ypiston exposed to the suction of the engine with a triangular port located in position to register with the said annular port upon the piston movement.

et. In a carbureter the combination with a piston exposed to the suction of the engine cylinder, of a cylinder therefor having an air port located in position to be controlled .by the movement of the piston, a source of gasolene supply, a stand-pipe in connection therewith, a top for the'stand-pipe adjustable relative to the tcp thereof for affording an adjustable annular gasolene port at the top, a sleeve surrounding said stand-pipe- -and adjustably Ecarried by the piston and provided 'with a triangular port located in position to register with the said annular port upon the piston movement.

5. In a carbureter .the combination With a two-diameter piston having a two-diameter chamber and a two-diameter cylinder for the piston; these being provided at their portions of greater diameter with air ports located in position to be closed when the pist-on is at the end of its inward stroke and opened by registering upon the outward piston movement, of a stand-pipe extending Within the piston chamber of lesser diameter and in connection with a source of gasolene supply, and a closed top sleeve carried by the piston and surrounding the stand-pipe and provided with a port communicating With the piston chamber of lesser diameter and located in position to be closed by the standpipe in the inward position of the piston and to form a port with the end of the stand-pipe on t-he'outward movement of the piston. 6. In a carbureter the combination with a two-diameter piston having a two-diameter chamber and a two-diameter cylinder for the piston, these being provided at their portions of greater .diameter with rectangular air ports located in position to be closed when the piston is at the end of its inward stroke and opened by registering upon the outward'piston movement, of a stand-pipe extending Within the piston chamber of lesser diameter and in connection with a source of gasolene' supply, a ltop for the stand-pipe for affording an annular port, and means for adjusting the top for regulating the port area, and a sleeve having a closed top carried by the piston and surrounding the stand-pipe and provided with a triangular port communicating with the piston chamber of lesser diameter land located in position to be closed by the standpipe in the yinward position of the piston and to form a port with the annular port on the outward movementof the piston.

Inwitness Whereoi:l I have hereunto set my hand in the presence of t-Wo subscribing witnesses.

CARLEY GOULD VELD. lVitnesses EDGAR F. BAssETT, Jr., THEODORE H. BEARSE. 

